Adele has reportedly been forced to use sign language as she tries to save her voice.

The singer was forced to pull out of a string of shows earlier this month and said she might never tour again due to severe problems with her vocal cords.

And now the mum of one has gone completely mute as she tries to rest her voice - even when checking out a potential school for her four-year-old son Angelo.

She was said to be using a "made-up sign language" while she visited a posh prep school in London this week with her husband Simon Konecki.

Adele was forced to cancel her final two London shows (Image: Getty Images North America)

"Adele wasn't making a sound, even if she was asked a direct question by people unaware of her vocal issues she wouldn't be tempted to answer," a source told the Sun .

"She was gesturing wildly at times to Simon to communicate and he was doing all the talking for them. It was almost funny at times because he joked that it was her made-up sign language."

The source added: "It looked like it was really frustrating her and she stroked her throat a few times as if it was hurting her.

Mirror Online have contacted Adele's representative for comment.

Adele was had ongoing problems with her vocal cords (Image: Getty Images Europe)

Earlier this month, it was reported that fans will get a full refund for the singer's cancelled London shows following complaints over the lack of booking fee refunds.

The sell-out performances at Wembley Stadium would have seen the multiple Grammy-winner round off her global tour in her home city.

She was forced to cancel the performances after damaging her vocal chords and told fans she was "heartbroken" and "devastated" by the decision.

Adele wrote in a handwritten note: “I went to see my throat doctor this evening because my voice didn’t open up at all today and it turns out I have damaged my vocal cords.

“And on medical advice I simply am unable to perform over the weekend. To say I am heartbroken would be a complete understatement.”

“I'm already maxed out on steroids and aids for my voice. I’ve considered doing Saturday night’s show but it’s highly unlikely I’d even make it through the set and I simply can’t crumble in front of you all and walk out on you in that way."

Adele, 29, said she had even considered miming, adding: "I’m so desperate to do them that I’ve even considered miming. Just to be in front of you and be with you.

It may be the last tour the star ever does (Image: Getty Images Europe)

"But I’ve never done it and I cannot in a million years do that to you. It wouldn’t be the real me up there. I’m sorry. I'm sorry for your disappointment. I'm sorry for the nights you would have made together. I'm sorry for the time and money you've spent organising your trips.

"You know I would not make this decision lightly. I have done 121 shows and I have 2 left. 2 left!!! And they are 2 gigantic shows! Who the f**K cancels a show at Wembley Stadium!?

"To not complete this milestone in my career is something I'm struggling to get my head around and I wish that I wasn't having to write this."